芝商所：12月29日收盘后上调多类金属期货保证金

Group 1 - The Chicago Mercantile Exchange (CME) announced a significant increase in margin requirements for various metal futures, including gold, silver, and lithium, effective after market close on December 29 [1][2] - This decision reflects the exchange's deep concerns regarding the unusual volatility in the precious metals market [1][2] - The margin increase applies to multiple contract specifications, including standard, mini, and micro contracts, covering nearly all core metal trading products offered by CME [1][2]